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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f3fe607030c9b746f765bd5761bb246bd3f6b9950c7b8bcfe1dd1c99f965a31' 
  AND token = 'PAkRgJw+3p+/bT+/x60Vbdt+47Za0EUr9ZQ6riR193c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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