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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba526b3beba5558ca0c8c817a6b779c3fac28fae5392a2cdb375c032d8f2f761' 
  AND token = 'EkbTspbrbmhCtsv6bLiI5i4fEbZu7uraYJ/P+fza4jE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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