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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '4a4b69b8ff7f346fe1025ec4c283ed0d12a76394ef3406d153b19ea82eae5702' 
  AND token = 'Yhx8iKsO+4cwUx0D2P4loIdDSPtrpvfxl7Kli8uuPGE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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