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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc9a5a282440f6a50098c9d688ca5c21fbc1ebf28b8ad9231a9904230179ea01' 
  AND token = 'Yeoqizh2bGaHpkmVvF/jL8gXn9IOqaJhWhJLXcrLPEI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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