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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62f004b8e4e0cce967b9dca7cfb802f8f14892c72d3b4329d6e0bdc35eff4e11' 
  AND token = 'vtpO9uizift6XkTv2b4u+ju5PP6/3zr2OdkwJwmtF8I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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