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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '058db11a62a3b6b60aa98ee4a29ed196c9aae34e25ef6e5a4931cbef8454bba9' 
  AND token = 'D4Sww0U2bDY8fM4YvYc+ITfIfqsDs9sloxBCGl6+AkA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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