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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc05f89536e2b6e045fcfc9bb8e6a2312a5f33ae0431d0d06ec984c5acc3a6db' 
  AND token = '3ZJUwRffX3/1A1J9ktRI+Z18qHbHz/SjhilhrBdAXbc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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