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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc6db5523fe7ec06bb45c54469018363ed69316989f11f038ddf5bb63ecdde06' 
  AND token = 'ti/zCw+x7zKy3Mf79gdIVp9PR7jIb/HrQaPFGWUahQM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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