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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e72e8b8116966fd768d9932ea1e193ade9c4d517fdca25f6b987683bf487b85' 
  AND token = 'iPUrNaaBl/RxPvNCx2N/P3fKHl4p9P5lxTAIqUzynbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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