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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2979596a8d86481e7cb8aeaae1f360c2505d5711f0aa00f8d3a686f891594b2c' 
  AND token = 'Mvteqqwk7B/kxFv5koSFFgeUg9rUAxVPT7h4w25R4g8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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