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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce4de6a4bf79c2c56e2a3a32351021ee916d928e715414fb4d6427288364b6b0' 
  AND token = 'w4FUwu1amshdlkUpbtZSy1J6jIT6QSYVf/9fX2M9r50=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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