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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6692e4d95349c15ed8c2549af58111883ae41fb1784f849b02a0c4f42fa9fedb' 
  AND token = 'wshrGRUxSuEQxyx7mKFl+Ffzte9IeesDy7zxvhbXzqc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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