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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0afd33ea22b2585a4900ed8da3e5ce18269b99e9b599fb73c7bf8a5b41e844c8' 
  AND token = 'V3fqTdq3dPZ8cwbCuQQ+H1K+BersmNeSWjbYL2QA2Ew=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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