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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8a153c38a639ecfb1484eb61265cf23374364e7be1ed73fb6ba7b46491392a02' 
  AND token = '4Fwii9yX3tvAopk26IIChXZvqBAe1r7tFrc84Qz+Nvs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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