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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a067f95c3cde6eb801dbdc6b934d7c4188fa16606e2c6257a352ef35e660d2d2' 
  AND token = 'Y0uwGO4Lx/tEByMCBPrXgr6mlkeX75EAbNsm8L230s8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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