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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d846cec2af9c9a929eb6a5ee5eeb7ad3f3e381492267578434488467504f224' 
  AND token = 'mY+1ghkCozXD5W3pz1cnA/mhU7gIo9ekNTzM1oPxkF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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