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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa2e9dd2596323ca341a0813ec72a1279afbfdcf54851df453dfef5b61652763' 
  AND token = 'Z4mwm/l4lsA8Ch+ceRoGcttIKI5WM6Y7FVyro/uralY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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