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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dee3e6c5b1f9ab7143cd4c7c2f449ac82f1c8d4c6c5e06b23df9a629a10f59ac' 
  AND token = '8BJRRCVNVoTOOzblcnakiFnkJF8mXWg3MWnAMuaVzro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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