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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '948fef1f5d6adba34006e17f5aba871137ba7df391060fb5f45d5027fa7d64f4' 
  AND token = 'AuYxJY/3Pq5SA2CKEMoimkk25LGwTtXw9Txm16AWDIU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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