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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '473c9e028b230590be12e7b42b265cd614d6cfb7c5961b56c992f022629d75a4' 
  AND token = 'xeyEKTWYm2aXCVuuiahwSYs6tr6lAPwjb+XfAGM04Jw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}