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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fc3be975f4c637de98604d4454981944ccea6636616ee6cbe162ea656b9b959b' 
  AND token = 'V+/CsZy5GFfrDpJH8lyN6rx8WuP8C0qEfdV+csYYw4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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