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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fcc04b53a75e16078f6aa234fea8932a2d155f7f845d4bc168bec0302e61de1d' 
  AND token = 'tJmuEsY1v91a5z5/MCsrUGREWWh7LeRljvkr+W/Lpe0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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