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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '907f3915b2ea1ba986da9c3660773b609438a2912d0c5586aaa5f6fa2a25c3ea' 
  AND token = 'rJR/us41gFXb2vZUVWooIc2xEO6o3KBK5aC+N7gDk0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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