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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '041113df61d5ed86a530f3a90b3c48f962436811cb070fb0ee7cea35a5cd2ba6' 
  AND token = 'k06GIZFsMZcsnifZGsQdfGr92mhRw+y/ZEc2P3Pwwag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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