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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'f7649c32cfaec4a252fad607854648cecbca3c8dcc4b10740e7095fcd3ac9e0a' 
  AND token = 'h1sUUg4TxKisDqEC/VdOF2PHSY8XU6dnakd1rqwtcDE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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