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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7f4b0b83c9f201c5fc6a7365e451a449e18f3fa0e952042e8fcbc374b0d11b2' 
  AND token = 'rISORitT30sr0RygwaFkHWvMpVgG2Vd8E8dxF0SVu1s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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