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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc34a3e4c1dd43ae74acab6b3fb84522a5af42662a25881c82e9543fd462e103' 
  AND token = 'yMuguhJ0zhZLHNvS7nblW6Bf36DmTWSSP5gOLcxl0as=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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