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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91f5de334307651fad1f67b9c4233a0521e74cdecfe9cb24558d83a59a81395a' 
  AND token = 'Gq9dnVF4bKTw0tSjE0BO/MhmWQhAYNKeD9p54Nw01oQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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