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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bc28fb69b4175a6b001c7e04fd5828c8b2598c80c4e12ddaebb256fca349895' 
  AND token = 'FQDUmyR7/L3aC0umK79RptySV++xoqFT90qK0jOitbU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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