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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '818005296417f15db47c77a34079efbb0c526ede833a9337f0ab2eab13d8d678' 
  AND token = '1Euzfrrxos1c+y7d+nDBQF8zU1GLhe1IB75nL5RSPzM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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