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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1025ea814fb2cb9b5c57b1fdc8fd74180a8994df5d26110ff3bf6fc7d479a293' 
  AND token = 'Tv7woDI1N22sdxikSbukI3JlmXyMy4fRK1am0WLRCas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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