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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'fde7d6ebe7ffd583021607b358c82b21ed43a76c0bd6b2fad471deb72196ca84' 
  AND token = '60PISAEKrqeh78HG8trdO0fu17mBdISYK+irSg0kahQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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