Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'fcafe7138fe1c8de9269e3f874d7ada8bc295eadcbd69cc14ebdda2dda681fd3' 
  AND token = 'lM40Q2R094mtSEiPH52dMg7jDOLA3NMXCOVdAlfTnPY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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