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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b0a7ee04975da0ede5c75eb2c25715ef074e2bdfd2904870faaae2d0bc308e5' 
  AND token = 'qtW5cK9jxpX9t6zHC44Vt+HvGvHhTW96GVRifmcAawc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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