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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ad657ed7463df97e9339f72c9b8adfb0aa3bae80527b71901ea9f12b8c88bb6' 
  AND token = '4pE5T7VNsLh+y163/lkb2RL0MOSA5S8fycSe6P8i+WY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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