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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '2ee62c750f211f7b76e7b93efe86c03f1840341ec58ef3a258c38aee531db923' 
  AND token = 'YrnbUC4HCvUrVz3DjN8y9jmuPOMaKVhAdfkTVsT/1aM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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