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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cd092e03161094ebca4723815ba0d4536327d3b5394a7c937f60c166d7f6efc8' 
  AND token = 'hXbFUjQsf1I9TzkCWmHv8Ne2kx9wTQo9NU5W57YsYT8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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