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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d58206715dc8ec343bf90c8d2ab7ce71c9148f45569fdfc65be9072d6eaabdd' 
  AND token = 'zzfsYNe3WFSeX51J6vNz4KN/o1FDFrw8Y/PTN3H5vi8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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