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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '622f8625d34b3f60ebd2f15d2d40c536a7022283746430ac0e76c7dd105eefb5' 
  AND token = 'VoWCgcIqfMVOrJj9td7KdE1J7anaIa+wOUTidNC6Z4M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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