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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f2d634768b48271d5e1a92f5727ef6865aebd7bc15e81bc649897c0f0c866128' 
  AND token = 'F2qije6uR0FXMaVN8hWUfqZx2MxKjhW2tUDCXQ6GF2k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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