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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '823defabce92359633437b16a20749f902f41e71e6a370078569c7f03cb0f007' 
  AND token = 'GlSWFaf+Y+XoCkjTgrHCWZcKj3BA5u1Yr2ldlvT7feI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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