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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f992f0105b834545d763445218b23d5bb8f39f91b64fe3325b6764d02a7a1a8' 
  AND token = 'JLuJ1ASKQbdoRupYeBwSkc37yfwAprMIYM0Z+9WQHEA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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