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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccb026aa59708cc8b55915dcc6c8ef9b3e772b3f5bd11a5cb6a7b0978043119d' 
  AND token = 'AdZmwLOoALOzZNs+15GA1u+EsfAXjlgFGsMQf07qEBc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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