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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '5a0f9833f1c9bee4941411b8cb34617d61e800f788f9c0fc1e5ad6f167d0ec1c' 
  AND token = 'RR0FeAQW1gzIRtduC81GpdyP1TwPpPrTodIQJNRP8dQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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