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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '8ba67e1dea68bfc12ae3ba231dee0107c3ff034d3ccfd53d5626f40876e66e10' 
  AND token = 'YGU9L9nsGffCrRXe1HyKD7y/Rv5FKp8XZBOwieatpuw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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