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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7667fe990970e2caccbdb9eabb0b5ea383ca2141a531180b15025a6f321917d7' 
  AND token = '5BWNxo49xVDYNYhVhSOJIsr3vhCW3tNDqyx19mhHL5g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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