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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc2e8949e65d2131f9f248f9266b5a3d9f85d81df6d447d0c0a2cbbc96572dfe' 
  AND token = 'ADdm/ohqwd5quif9eR6sdFergjpPrHy7A15ddQUnQhE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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