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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2a25c2579c0fc5c4dd13ecab3a6f2a058b09fd88a371bc5a94a32c873f237041' 
  AND token = '+r0/sikhz7xwS+UtZMUg2drp+MHDyK0dJPOO59zroUM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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