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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9190c29b3ef5bea946c465cd9446ba14897549fe4b0a2c24410e6d0a9cb3981d' 
  AND token = 'GBzRWrU4eeH7SZ4UUykKVgVXOgIwut+o0T13Bx87rG4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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