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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4496ba97411987dc18de229efc015a380b41702867e380c03ed021804e742d01' 
  AND token = '0oQ/M6pKfLAYU1dsaycoZd69v5fEirPtkJF2PAhiHAk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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