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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05d0a5b116ded66a58d84fb3f23a4e34711a509be9acd697a1f8db392d028e84' 
  AND token = 'npcY1+5aoLhn3ygOT4R1CGfw6Qhk9/GOWqGUT4vutrM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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