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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00fbfe81beb8ef8651847b9689c4817dc079aaa8af26df2fc67439f0e487ad6f' 
  AND token = 'AR8fRVVZRsjWu0pt7vI+kf79Y+/zzNXBMUVEzq4zp8c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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