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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '867ae1b5487ea9846aaba512012c1bbb037c4d10fc5377ab0ddfe01c46857ce0' 
  AND token = 'Mqec/GMRU7p4ykr/gVKsONBTY8k0lBBlDqnOxCgjpZ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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