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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f02a057a663cdd4e0f19882744c55e117c8be3a447be467783431d5c1cf5d54a' 
  AND token = 'R4E8Crg5T95vze6oXy/ESjvNdRt3EqgS3cyGa6j9h+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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