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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ab39bfa9ea163ac3717b1a98e5e153572f8a6f9819ef2aef111a698d5464229' 
  AND token = 'uwrbFWCnCYozYnTr6tRiyi2prubiAPyySNCmlT67j2M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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