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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e1a2fd09cef0d12bc6a0e0b0377d24a95c99c914e1f8d59067e636db78836c5' 
  AND token = 'zpUipdzAkKatmWuRcy5tnJ0fmb1by2FIikdIhv24AeE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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