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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '396a7a59c36464ba759a2eb65eeb9e6fa8c57a436ddae1158de766e72edb8482' 
  AND token = 'uaCfNg6OOu57UjCgEB+6w/aEf8N9U1SUQ+LM3jFd1Mc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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