SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f081054bf5afa75b3e908b8c288876e3f52514aac24122e5329f57bbdb2d0d3' 
  AND token = 'V3Cuw/DYDgvhoivFuWWUgtBEOAR2rJWq/W7ULCIN3rg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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