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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bb4ad2b4137b4f3c31afcb15bc59fe141ceca10db3530ebae0d276f22e78c1fe' 
  AND token = 'Wmm2phqhY1FNytqbL+o/109/PBSYDaX5w/ECKvSWUJA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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