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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2b5aef10941bbb6dc3562d9b8e9c6cfc4872c2c6416055a57c44bfda46d28f0' 
  AND token = '0UAWEcLSC0NXV8hlHQCINwImfhORQ1g65Q3Uo0tDzmQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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