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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b72bac026e0b1aa4da2506d0306310cbf4af1de0129a3977df3ab416e9f1213b' 
  AND token = 'X63pWHgLlGLt0DB9ESUiBhKo0tbfArILC3hU+fsRRWQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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