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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de13a4174316f685b8293e1f90b67ad5b320c66b4d2b83388077cb2d27046e7c' 
  AND token = 'Ej5lW0BHxkS3eOTgR/HzbGXCMydYEoTCx2EnbWTo+kE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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